Is the inch exactly 2.54 cm [the standard international foot], or is the yard exactly 39.37 cm [the US survey foot]?
Wait...if a yard is 39.37 cm than a foot is 12 1/3 cm, which would make an inch 1 1/36 cm. That's off from 2.54 cm by way more than 2 ppm!
A yard would be exactly 91.44 cm if the inch is 2.54 cm, and something very very close to that if it is 2 ppm from the "inch is 2.54 cm" yard.
Did you copy/paste the wrong thing? A survey foot is 1200/3937 meters (making a yard ~91.44018288 cm), so 3937 would probably be floating around somewhere on any page talking about this.
Comments
Wait...if a yard is 39.37 cm than a foot is 12 1/3 cm, which would make an inch 1 1/36 cm. That's off from 2.54 cm by way more than 2 ppm!
A yard would be exactly 91.44 cm if the inch is 2.54 cm, and something very very close to that if it is 2 ppm from the "inch is 2.54 cm" yard.
Did you copy/paste the wrong thing? A survey foot is 1200/3937 meters (making a yard ~91.44018288 cm), so 3937 would probably be floating around somewhere on any page talking about this.
You're right--it should have been a meter is exactly 39.37 inches.